Annika Ben David said that if the government presses ahead with plans to dissolve the opposition, Sweden would rethink its relationship with the Kingdom.
The European Union, the United States, and United Nations have all voiced their concerns over Kem Sokha’s arrest ahead of next year’s general election.
The Cambodian government produced a video which is said showed Rainsy admitting to the allegations.
EU and Swedish reps say dissolution of opposition will be met with consequences.
Hundreds of Cambodian opposition commune chiefs face dissolution just months after taking power. VOA's Tum Malis report and David Boyle report.
Hun Sen compared Cambodia’s situation to that of South Korea and Thailand, saying other countries’ governments do not consider the people’s will.
The parties accepting the offer are Funcinpec and the Cambodian Nationality Party (CNP), while the League for Democracy Party (LDP) declined to take part in the deal.
Earlier this month, Pol Saroeun, commander-in-chief, ordered military officials to become front-line soldiers in the “battle of public opinion” using social media site Facebook.
Hundreds of Cambodian opposition commune chiefs face dissolution just months after taking power.
The Cambodian government rushed through legislative amendments on Monday all but sealing the fate of more than 480 commune chiefs elected just months ago under the banner of the opposition Cambodian National Rescue Party, or CNRP.
The Cambodian government has hailed the move as evidence of the health of Cambodian democracy.
The international community has voiced strong opposition to Kem Sokha’s arrest and called for an easing of tensions.